Individual fibre separation in 3D fibrous materials imaged by X‐ray tomography

Abstract

Modelling the physical behaviour of fibrous materials still remains a great challenge because it requires to evaluate the inner structure of the different phases at the phase scale (fibre or matrix) and the at constituent scale (fibre). X-ray computed tomography (CT) imaging can help to characterize and to model these structures, since it allows separating the phases, based on the grey level of CT scans. However, once the fibrous phase has been isolated, automatically separating the fibres from each other is still very challenging. This work aims at proposing a method which allows separating the fibres and localizing the fibre-fibre contacts for various fibres geometries, that is: straight or woven fibres, with circular or non-circular cross sections, in a way that is independent of the fibres orientations. This method uses the local orientation of the structure formed by 220

Sustainable Manufacture of Natural Fibre Reinforced Epoxy Resin Composites with Coupling Agent in the Hardener

“…Further, the density of the resin (~1200 kg m −3 ) and fibre (~1500 kg m −3 ) is too close for good x-ray contrast. Depriester et al [57] have recently presented an algorithm for individual fibre separation in 3D fibrous materials imaged by X-ray tomography Future work should also consider validating the idea with Life Cycle Assessment to quantify the environmental burdens and the benefits of the process.…”

“…Further, the density of the resin (~1200 kg m −3 ) and fibre (~1500 kg m −3 ) is too close for good x-ray contrast. Depriester et al [57] have recently presented an algorithm for individual fibre separation in 3D fibrous materials imaged by X-ray tomography.…”

Thickness Measurement of Self-Lubricating Fabric Liner of Inner Ring of Sliding Bearings Using Spectral-Domain Optical Coherence Tomography

“…Apart from the aforementioned destructive methods, nondestructive testing (NDT) methods can also be used to detect internal flaws in materials to avoid the destruction of the samples, including X-ray tomography technology, ultrasonic tomographic imaging, terahertz imaging technology, etc. [13][14][15][16][17]. Limited to the system's structure and size of these methods, it is difficult to meet the requirement of the inner ring dimensions of the bearings, especially for small-diameter samples.…”

Effect of Polydispersity on the Transport and Sound Absorbing Properties of Three-Dimensional Random Fibrous Structures

“…These tests are interesting but still remain difficult to carry out as they require permeable porous media to enable the propagation of ultrasonic waves through the thickness of the material. On the other hand, significant progress has also been realized to characterize finely the nonwoven fibrous media microstructures with imaging techniques such as scanning electron microscope images (Luu et al [21]) and optical granulomorphometry (He et al [23]) or X-ray microtomography coupled with advanced image analysis procedures (Matijasevic-Lux et al [38], Peyrega et al [39], Depriester et al [40]). For instance, we investigated the effect of fiber distributions (orientation, length, diameter) on several transport parameters of low density glass wools from optical granulomorphometry (length, diameter) and scanning electron microscope images (orientation) for ten products provided with two different classes of surface densities.…”